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    <title>Document</title>
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    <script>
        // 引用类型(浅拷贝)
        let obj = {
            name: "张三",
            list: ["李四", "王五"]
        }

        let obj2 = { ...obj, list: [...obj.list] }
        obj2.list[0] = "李四四四"
        console.log(obj)
    </script>
</body>
</html>